Aerial view taken in 1936 by the National Geographic Salmon River Expedition showing ground being dredged in Warren Meadow. Note the dredge is in the middle of the photo. The general pattern of dredge ponds and tailings piles created in this...

General Roberts' boiler in transit from Weiser to Warren, Idaho, to be used for the dredge in Warren's placer mines. View taken at (old) Meadows "Racing Park" 95 miles south of Grangeville, Idaho. J. A. Hansen photo, Grangeville.

Correspondence, legal documents, and subject files. Correspondence with William E. Borah and D.W. Davis about a government pardon for Harry Orchard; minutes of the Associated Distributing Company (Boise, Idaho); motion for pardon of Paul Corcoran...

Fifteen men sitting on a pile of milled lumber at the Bonanza Placer Mine near Leesburg, Lemhi County, Idaho. Men are wearing overalls, shirts, hats, and boots. There is a horse in the background and the landscape is lined with trees.

Hydraulic placer mining on the Boise River near Twin Springs in Elmore County, Idaho. Photo shows a miner operating a hydraulic giant on a hillside while another miner is inspecting the runoff in the ground sluice below.

"Placer Mining Wheel" at Salmon River Point, about one mile above the mouth of the Little Salmon River. This appeared in the U.S. Government Hydrographic Report and received special mention above all others by Mr. Newell, chief of that survey.